contrary. Nevertheless, he considers Lily a confidante, seeking her advice on winning Robin over and telling her deeply personal secrets, such as his failed ambition to be a concert violinist. He also admires her skill at lying and manipulating people, considering it to be on par with his own. While Lily calls Barney "the world's biggest pervert" and a "womanizing creep", she also considers him one of her best friends. Throughout the series, it is evident that while Barney is good friends with Ted and Marshall, Lily is really the one who helps him most as a person. Along with the other main characters, Lily is present for the birth of Barney's daughter. Romantic relationships Robin Scherbatsky Barney and Robin start out as friends, but he falls in love with her after they impulsively sleep together in "Sandcastles in the Sand". Throughout Season 4, he struggles with his feelings for her, until they finally get together in the season finale "The Leap". They become a full-fledged couple in season 5, but they break up in "The Rough Patch" when they find that they are making each other miserable. They never truly get over each other, however, even while they are dating other people. In the eighth season, he launches an elaborate plan to win Robin's heart (encouraged by Ted's future wife) that ends with Barney proposing to her. She accepts, and they get engaged. The final season revolves around their wedding weekend. After much doubt and soul-searching, they get married in "The End of the Aisle". The series finale, "Last Forever", reveals that, after three years of marriage, they get divorced because Robin's work schedule prevents them from spending any time together. They do not see each other again for several years, until Ted's wedding; the series' alternate ending implies that following Ted's wedding, Barney and Robin eventually got back together. This shows that Barney always loved Robin and always will as she is the one who got him to settle down in the first place and that it is never too late for them. Others Barney has two other serious girlfriends throughout the series: Nora (Nazanin Boniadi), on whom he cheats with Robin, and ends the relationship with in hopes Robin would do the same with her boyfriend at the time, Kevin. However, he is left broken hearted when he finds out that Robin chose to stay with Kevin.